After writing my recent article on Growth Hackers, I’ve been asked by quite a few folks on how to learn the discipline. The best answer is, learn from someone who’s already good at it – if you’re technical and creative, it’s well worth the time.

The list below includes some of these folks I know personally, some just by reputation- but collectively they’ve grown products up to millions, 10s of millions, and in some cases, 100M+ users. Typically they use quantitatively-oriented techniques centered on virality across different channels such as iOS, Facebook, email, etc. There’s lots of iteration, A/B testing, and experimentation involved. There’s also really great growth hackers centered around SEO, SEM/ad arb, and other techniques, but for the most part I’m just listing out the folks around quant-based virality. The important thing about virality is, it’s free :) So it’s an important skill for startups.

Missing from this list are many unsung heroes over at Zynga, Dropbox, Branchout, Viddy/Socialcam, lots of ex-Paypal/Slide people, etc., etc. Also, all of these guys typically have co-founders or entire growth teams around them that are experts, even if I don’t know them by name.

If others in the community would like to make suggestions, tweet me at @andrewchen or just reply in the comments.